Yuav ua li cas Rail Pads raug cais
Lub tsheb ciav hlau pad muaj peb txoj haujlwm: cushion lub tsheb ciav hlau ko taw, damp vibration, thiab tiv thaiv tus neeg pw tsaug zog lossis slab los ntawm qhov chaw thau khoom. Kev faib tawm ua raws cov khoom siv thiab kev ua haujlwm xa tawm, vim tias ob qho kev txiav txim siab nruj, rwb thaiv tsev, hnav tsis kam thiab tus nqi. Cov chav kawm tseem ceeb hauv kev pabcuam yog roj hmab, polyurethane, EVA, HDPE, insulating pads thiab qhov siab - hloov ntaub qhwv, thiab txhua tus muaj lub hnab ntawv ua tau zoo.
Rubber vs Polyurethane Pads
| Khoom | Roj hmab ncoo | Polyurethane ncoo |
|---|---|---|
| Static tawv | 20-60 kN / hli | Ntau qhov nruj dua, thauj khoom -tunable |
| Hnav tsis kam | Qib siv | Kwv yees li 30 feem pua siab dua |
| Qhov kub thiab txias | Yooj yim rau kev laus thiab hardening ntawm qhov kub thiab txias | Nyob ruaj khov ntawm -40 txog 70 degrees Celsius |
| Elongation thaum so | Tshaj 500 feem pua, zoo elastic rov qab | Tsawg elongation, siab zog |
| Hloov lub voj voog | Lub hauv paus | 2-3 zaug ntxiv |
| Hom kev siv | Pa railways, nroog rail transit | Heavy-lav thiab siab - kab ceev |
Rubber pads yog qhov kev lag luam zoo: kev poob siab zoo thiab, nrog rau kev tsim kom zoo damping, qauv - ua rau lub suab nrov txo nyob rau hauv qhov ntau ntawm 5-15 dB nyob ntawm daim ntawv taug qab. Polyurethane pads pauv tus nqi siab dua rau lub zog, nkag siab thiab ua haujlwm ntev, uas yog vim li cas cov kab hnyav hnyav tau txais tus nqi.
EVA thiab Insulating Pads rau Signaled thiab Metro Track
EVA pads yog tsim los ntawm ethylene-vinyl acetate copolymer nrog cov ntsiab lus vinyl acetate li ntawm 20 feem pua thiab qhov ceev ntawm 0.95-0.98 g / cm3. Lawv ua ke elasticity nrog hluav taws xob rwb thaiv tsev: rwb thaiv tsev tiv thaiv mus txog 1 x 10 mus rau lub zog ntawm 10 ohms, uas tiv thaiv kev khiav hauj lwm Circuit Court, tensile lub zog tsis tsawg tshaj li 15 MPa, thiab elongation tshaj 500 feem pua. Lub melting ntau ntawm 170-190 degrees Celsius muab tus cwj pwm zoo kub. EVA pads haum rau hauv nroog tsheb ciav hlau, choj thiab cov kab kab uas yuav tsum tau muaj kev poob siab thiab kev rwb thaiv tsev, thiab lawv tuaj yeem ua ke nrog cov ntaub qhwv dawb los kho qhov siab ntawm 1-30 hli cov kauj ruam.
Insulating pads coj lub rwb thaiv tsev ua haujlwm ntxiv. Sau nrog iav fiber ntau thiab epoxy systems, lawv muab cov rwb thaiv tsev tiv thaiv tsawg kawg yog 1 x 10 mus rau lub zog ntawm 9 ohms, compressive zog tsis tsawg tshaj li 25 MPa, thiab lub thickness kam rau ua ntxiv los yog rho tawm 0.5 hli yog li ntawd lawv zaum nruj nreem tiv thaiv txoj kev tsheb ciav hlau. Lawv yog cov khoom tseem ceeb ntawm cov kab hluav taws xob thiab cov hluav taws xob railways; Yog tias ntsuas kev tiv thaiv hluav taws xob poob qis dua 500 megohms, lub ncoo yuav tsum tau hloov ua ntej teeb liab cuam tshuam.
HDPE Pads rau Hnyav -Haul Kab
High-cov ntaub qhwv polyethylene ceev tau teev nyob qhov twg qag loads nce. Cov khoom siv sib xyaw ua ke siab compression modulus - ntawm qhov kev txiav txim ntawm 0.8-1.2 GPa - nrog lub zog compressive yam tsawg kawg nkaus 30 MPa, yog li lub ncoo tuaj yeem nqa cov khoom hnyav ntawm 27-tonne qag hnyav- tsheb thauj mus los yam tsis muaj thinning. Kev hnav tsis kam yog kwv yees li peb zaug ntawm cov roj hmab zoo tib yam, thiab kev laus ntawm sab nraum zoov muaj zog: tsis muaj qhov tawg lossis chalking ntau xyoo ntawm kev raug. Deformation yog nruj tswj hwm - tsis pub ntau tshaj 2 hli nyob rau hauv ib tug 50 kN load - uas yog dab tsi ua rau taug qab geometry ruaj khov thaum log-rail quab yuam siab thiab ncoo tsis ua hauj lwm yuav txhais ncaj qha mus rau hauv kev sib hais haum.
Qhov siab hloov Pads thiab cov ntawv sau
Qhov siab- hloov ntaub qhwv yog tsim los ntawm polyethylene los yog nylon nyob rau hauv thicknesses ntawm 1 mus rau 30 mm thiab kho me me yuam kev uas tshuav los ntawm kev sib hais haum. Lawv hardness yog siab (Shore A ntawm 90 los yog ntau tshaj) thiab compressive zog tsawg kawg yog 30 MPa, yog li lub ncoo tsis nkag mus rau hauv load thiab cov kev hloov nyob rau hauv qhov tseeb. Cov ntsej muag tiv thaiv muaj cov khoom tiv thaiv -slip textures kom nres lub ncoo taug kev hauv qab tsheb. Kev teeb tsa cov kev cai tseem ceeb: ntsuas qhov siab qhov sib txawv ua ntej, tom qab ntawd phim lub ncoo thickness, thiab tsis txhob muab ntau tshaj peb txheej, vim tias txhua qhov sib txuas yog lub dav hlau plam.
Cov lus nug nquag
Roj hmab los yog polyurethane - Kuv yuav tsum xaj dab tsi?
Ua raws li qhov kev txiav txim siab ntawm qag load thiab kab kawm. Pa thiab nroog rail kab nrog nruab nrab loads khiav roj hmab pads kev lag luam; hnyav-haul thiab siab- cov kab nrawm ua kom pom tseeb cov nqi ntawm polyurethane nrog lub neej ntev thiab ruaj khov.
Lub ncoo twg tuav 27-tonne qag loads?
HDPE pads, nrog rau compression modulus nyob rau hauv qhov kev txiav txim ntawm 0.8-1.2 GPa thiab compressive zog ntawm yam tsawg kawg nkaus 30 MPa, yog tus qauv xaiv rau hnyav-haul tes hauj lwm thiab khaws deformation nyob rau hauv 2 hli ntawm 50 kN load.
Lub ncoo twg muab hluav taws xob rwb thaiv tsev rau cov kab hluav taws xob khiav?
EVA pads thiab tshwj xeeb insulating pads. EVA xa cov rwb thaiv tsev ntawm 1 x 10 mus rau lub zog ntawm 10 ohms; insulating pads nrog iav -fiber thiab epoxy filling xa tsawg kawg yog 1 x 10 mus rau lub hwj chim ntawm 9 ohms nrog ib tug 0.5 hli thickness kam rau ua.
Muaj pes tsawg txheej txheej raug tso cai?
Tsis ntau tshaj peb. Cov khaubncaws sab nraud povtseg ntxiv ua rau lub dav hlau plam thiab txo kev ruaj ntseg. Yog tias xav tau qhov siab ntau dua li peb txheej muab, lub hauv paus lossis kev pw tsaug zog yuav tsum tau kho dua.
Thaum twg yuav tsum tau hloov lub ncoo?
Ntawm qhov pom kev tawg, teeb tsa mus tas li dhau qhov kev qhia tshwj xeeb, poob ntawm cov rwb thaiv tsev hauv qab 500 megohms rau cov ntaub qhwv insulating, los yog kev hloov khov kho tau pom los ntawm cov lus qhia geometry. Hloov cov voj voog rau polyurethane pads khiav ob mus rau peb zaug ntev dua rau roj hmab.
Cov ntaub qhwv tuaj yeem txo cov suab nrov thiab kev co?
Yog lawm. Lub ncoo mos decouples lub tsheb ciav hlau los ntawm kev txhawb nqa thiab txiav cov qauv- ua suab nrov; Kev txo qis ntawm 5-15 dB yog qhov tseeb nyob ntawm daim ntawv taug qab. Kev lag luam tawm yog qis dua kev ruaj ntseg, uas yog vim li cas qhov tawv nqaij sib phim rau cov kab hauv chav kawm ntau dua li qhov siab tshaj plaws.